Hi list,
I have encountered a problem with a difference in the quality of display of a
raster depending on whether the layer is in a LayerGroup or not.
On its own, i.e. not in a layer group, the image displayed is of good quality
with nice smooth text, lines etc.
In the LayerGroup the image is of bad quality with text and lines ‘chunky’.
I have set the interpolation method for the layer and for the wms service to be
‘bicubic’
It is as if the interpolation method is not being used when the layer is in a
LayerGroup. Is this possible? Is there a way of setting the interpolation
method for a LayerGroup raster layer?
I have the same issue whether or not the layers are tiled through geowebcache.
I am using GeoServer 2.1 installed on Windows 7 on JBOSS 5.1. The JRE is
version 1.6 64bit, and as a consequence I am NOT using the native JAI ImageIO.
Any help or insight on this would be gratefully accepted.
Regards
Donnacha
P.S. The following data on the image may or may not be relevant
Images are brought in through an Image Mosaic data store.
Images are of type GeoTIFF.
The following is a gdalinfo read out on one of the files
Driver: GTiff/GeoTIFF
Files: XXXXXXXXXX
Size is 4724, 4724
Coordinate System is:
PROJCS["TM75 / Irish Grid",
GEOGCS["TM75",
DATUM["Geodetic_Datum_of_1965",
SPHEROID["Airy Modified 1849",6377340.189,299.3249645999944,
AUTHORITY["EPSG","7002"]],
AUTHORITY["EPSG","6300"]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433],
AUTHORITY["EPSG","4300"]],
PROJECTION["Transverse_Mercator"],
PARAMETER["latitude_of_origin",53.5],
PARAMETER["central_meridian",-8],
PARAMETER["scale_factor",1.000035],
PARAMETER["false_easting",200000],
PARAMETER["false_northing",250000],
UNIT["metre",1,
AUTHORITY["EPSG","9001"]],
AUTHORITY["EPSG","29903"]]
Origin = (179997.883149873000000,120002.116850127010000)
Pixel Size = (4.233700254022000,-4.233700254022000)
Metadata:
TIFFTAG_SOFTWARE=Adobe Photoshop CS Windows
TIFFTAG_DATETIME=2009:02:23 10:38:48
TIFFTAG_XRESOLUTION=299
TIFFTAG_YRESOLUTION=299
TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch)
AREA_OR_POINT=Area
Image Structure Metadata:
COMPRESSION=DEFLATE
INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left ( 179997.883, 120002.117) ( 8d17'36.40"W, 52d19'52.95"N)
Lower Left ( 179997.883, 100002.117) ( 8d17'32.14"W, 52d 9'5.84"N)
Upper Right ( 199997.883, 120002.117) ( 8d 0'0.11"W, 52d19'54.26"N)
Lower Right ( 199997.883, 100002.117) ( 8d 0'0.11"W, 52d 9'7.14"N)
Center ( 189997.883, 110002.117) ( 8d 8'47.19"W, 52d14'30.38"N)
Band 1 Block=256x256 Type=Byte, ColorInterp=Red
Overviews: 2362x2362, 1181x1181, 591x591, 296x296, 148x148, 74x74, 37x37,
19x19, 10x10, 5x5
Band 2 Block=256x256 Type=Byte, ColorInterp=Green
Overviews: 2362x2362, 1181x1181, 591x591, 296x296, 148x148, 74x74, 37x37,
19x19, 10x10, 5x5
Band 3 Block=256x256 Type=Byte, ColorInterp=Blue
Overviews: 2362x2362, 1181x1181, 591x591, 296x296, 148x148, 74x74, 37x37,
19x19, 10x10, 5x5
------------------------
Donnacha Nelan, Software Architect,
1Spatial Ireland
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